This seems like a really bad decision to me. Here’s the whole thing in English:
http://press.vatican.va/content/salastampa/it/bollettino/pubblico/2019/01/03/0005/00014.html#en
I don’t really understand how this is not direct sterilization, unless they are claiming life does not being at conception–which it looks like they are. The CDF seems to be saying the good of procreation has not been achieved merely by conception–the creation of a new life–but only when a baby is brought to viability. Therefore, if conception is possible, but bringing the baby to viability is not, there is no sterlization since no good is being prevented.
That seems very dehumanizing to persons who have not reached viability! A person has worth and is a good from the moment of conception!
In the cases at hand the utuerus poses no threat to the mother, but rather it is being removed to prevent the premature deaths of children that may be concieved–by preventing their conception in the first place! The very intended effect is to prevent conception! This is the definition of contraception and the Church has said over and over (including in the CDF document cited by this one, which dealt with the same issue, except the potential harm addressed was to the mother, not the child) that we can’t directly intend sterilization or contraception even for a good end.
And by what logic is this limited to a hysterectomy to prevent conception? Using the logic of this response, using other forms of contraception (condoms, spermicide, etc.) would also be acceptable since they are not really preventing the good of procreation but only conception, since development to viability is not possible in this case.
Humanae Vitae specifically says the Church considers “always unlawful the use of means which directly prevent conception, even when the reasons given for the latter practice may appear to be upright and serious.”
The CDF specifically is saying it is ok to directly impede conception when the pregnancy will certainly result in a spontaneous abortion. That is doing evil for good.